[stragies]

For this scenario I'd like to buy a device powered by POE, with USB-Eth, some free USB-Ports with PPPC, and some contraption, that goes through a hole in the back of the phone to the battery connector inside.

I had assembled something like that for my old SGS2 alarm clock out of a POE-5V splitter, an USB otg adapter, an Uhubctl-compatible USB-HUB powered by the POE-Splitter, and assorted cabling including a lead to the internal battery terminal with the top bar of an old battery (It contains some electronics). UGLY. Does anybody know a pre-made device like that?